I have asked this in another thread, but I feel this question could profit more with its own thread.
I have two digital devices, a 3.3V XBee Pro wireless module and a 5V openLog datalogger, fitted on a board.
I want to selectively cut power to those devices, so I placed a dual DIP switch between those devices and the ground terminal.
I purposely put the switches in the ground line, instead of the power line; there was a reason for that but it's not directly relevant.
However, I worry about the fate of the floating I/O pins of those devices, as they are still connected to the rest of the board.
Could there be any complications, such as current flowing in unexpected and unwanted ways?
Would it make any difference if I placed the switch in the Vcc line?
Is there any standard way to unpower devices on a board when they are not used?
Thanks in advance.
I have two digital devices, a 3.3V XBee Pro wireless module and a 5V openLog datalogger, fitted on a board.
I want to selectively cut power to those devices, so I placed a dual DIP switch between those devices and the ground terminal.
I purposely put the switches in the ground line, instead of the power line; there was a reason for that but it's not directly relevant.
However, I worry about the fate of the floating I/O pins of those devices, as they are still connected to the rest of the board.
Could there be any complications, such as current flowing in unexpected and unwanted ways?
Would it make any difference if I placed the switch in the Vcc line?
Is there any standard way to unpower devices on a board when they are not used?
Thanks in advance.